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Finding the Fourth Proportional to 388.49, 535.83 and 248.46

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Solution

The fourth proportional to 388.49, 535.83 and 248.46 is: 342.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.49 : 535.83 = 248.46 : x
  2. Step 2: Convert to fraction form
    388.49/535.83 = 248.46/x
  3. Step 3: Cross multiply
    388.49x = 535.83 × 248.46
  4. Step 4: Simplify right side
    388.49x = 133,132.32
  5. Step 5: Solve for x
    x = 133,132.32/388.49
  6. Step 6: Final answer
    x = 342.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.